Latest Ubuntu related questions

Score: 0
Carlos Garcia-Vaso avatar
Can't generate SSH ed25519-sk key
cn flag

I'm trying to generate an ed25519-sk SSH key in Ubuntu 20.04.03 LTS. However, I get a 255 error code when I try. I'm using OpenSSH version: OpenSSH_8.2p1 Ubuntu-4ubuntu0.3, OpenSSL 1.1.1f 31 Mar 2020. See below for the command I'm using and its output:

$ ssh-keygen -vvv -t ed25519-sk                                                     
Generating public/private ed25519-sk key pair.
You may need to  ...
Score: 1
Chen-Y0y0 avatar
The circle always spins near the text "Available Networks" in Wi-Fi setting in Ubuntu Settings(Ubuntu 20.04.2 Desktop)
in flag

The circle always spins near the text “可用网络” in Wi-Fi setting in Ubuntu Settings. And there is no avaliable network to connecting.
I restarted NetworkManager.service, it did not work.
I edited /etc/NetworkManager/NetworkManager.conf with replacing as managed=true and saved, it did not work either.
I used nmcli command, it did not work.
I rebooted Ubuntu, it did not work.
My computer: A ...

Score: 2
BlandCorporation avatar
How can a reverse-SSH connection be launched and maintained on Ubuntu boot with systemd?
cn flag

My mum has a wee laptop that needs, when it boots up, to reverse-SSH connect itself to a server (so I can help out when needed).

I'm struggling to get the connection to persist when it is started by systemd.

In /reverse_SSH.sh I've got something like this:

#!/bin/bash
while true; do
    ssh -R 19123:localhost:22 mum@www.example.org
    sleep 1000
done

In /etc/systemd/system/reverse_SSH.service I've ...

Score: 1
Infurious avatar
PulseAudio not passing AC3/DTS, downmixing to stero
mx flag

Running Kubuntu (KDE) 20.04

TLDR: Pusleaudio won't pass AC3/DTS to my external DAC via coaxial S/PDIF, but ALSA will if an application has a setting to direct output to ALSA.

I'm using my motherboard's coaxial SPDIF connection to connect to my 5.1 speaker system that has it's own DAC (Logitech Z906). The only way I've been able to get 5.1 surround to work is with VLC audio set to ALSA audio output >  ...

Score: 2
Stuart avatar
How to repair broken symbolic links
lb flag

The system is using Kubuntu 20.04.1 fully updated.

I am currently trying to get an old O.U. Sense board (an SBC) up and running. I have managed to install the software for its Scratch/Squeak based IDE. However when I try to run the ide it does not run. On issuing the ldd command and piping its output into grep the system displays the following output.

kub@kub-SATELLITE-L870-18V:~$ ldd /usr/lib/Sense/* ...
Score: 0
Joseph Dalton avatar
System shuts off randomly when booting Ubuntu
co flag

I have a C246 mainboard with a Xeon CPU and ECC RAM. Using Ubuntu 20.04, the system randomly shuts off completely, as if power was lost.

At first, I suspected a HW problem. I switched the PSU, I swapped the mainboard (same model) and I ran MemTest to check RAM. The problem can occur when using a USB device (installer) or when installed to a disk. I tried installing Windows and never observed a sh ...

Score: 1
magnus avatar
Firefox doesn't restore previous session when I have it checked in settings
cn flag

For some reason Firefox doesn't restore my previous session, even though I have it checked in settings. It does however open the tabs, and most of them are just blank New Tabs, while the rest is the correct tabs.

Anyone know what can be the issue here? Im running the newest Ubuntu version: Description: Ubuntu 20.04.3 LTS Release: 20.04

Its also the newest Firefox version

Score: 3
Kernel: 5.11, Wi-Fi UNCLAIMED, "dmesg |grep iwlwifi" is empty. Wifi [8086:2725] Subsystem [1a56:1673] has nothing on internet
ec flag

What I have different from all other cases is that I have nothing on dmesg.

# dmesg |grep iwlwifi | wc -l
0
  • I have dual boot with Windows 10.
  • Windows "Fast Startup" is disabled.
  • Secure boot is disabled (I have it enabled when install the linux, but disable to fix nvidia).
  • Ubuntu 21 "Ubuntu 21.04.
  • The classic "Ubuntu Drivers" only offer drivers for NVidia
# inxi -Fxxxrz
System:    Kernel: 5.11.0-34 ...
Score: 5
Garo avatar
What is the effect of packages installed by snap on memory usage?
us flag

I never used snaps before. When reading the vague descriptions I assume it's implemented in a way really similar to containers.

This makes me assume that programs in snaps all use their own libraries. But because 'regular' programs use the default libs from the system I assume multiple libs will be loaded which will cost a lot of memory...

Is this indeed the case ?

Related: Are there other disadvantage ...

Score: 0
Y DE avatar
Unable to install anything using apt-get or update - error about GRUB configuration file and processing kernel image
pw flag
(Reading database ... 234944 files and directories currently installed.)
Removing linux-image-5.8.0-55-generic (5.8.0-55.62~20.04.1) ...
/etc/kernel/postrm.d/initramfs-tools:
update-initramfs: Deleting /boot/initrd.img-5.8.0-55-generic
/etc/kernel/postrm.d/zz-update-grub:
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Script `/b ...
Score: 0
SabZero avatar
Main PID: 261452 (code=killed, signal=ABRT) Linux Ubuntu
tr flag

When I run my project asp.net core on the vps server - I get this error.

sudo systemctl status employeeservicefile.service

● employeeservicefile.service - Running ASP.NET Core on Ubuntu 18.04 Webserver APACHE
 Loaded: loaded (/etc/systemd/system/employeeservicefile.service; enabled; vendor preset: 
  enabled)
 Active: activating (auto-restart) (Result: signal) since Sat 2021-09-18 11:46:43 CEST; 4s ...
Score: 1
Grot_6 avatar
BLACK SCREEN Aftern installing new GPU on Ubuntu 20.04 new pc
kh flag

Recently I decided to upgrade my Desktop PC, so I bought a few things to try a new setup. I also decided to keep my 2 hard drives, 1 SSD in which Ubuntu 20.04 is installed, and 1 HDD which I use for storage.
I also kept the PSU a corsair 650 unit.

I did change the motherboard in a new B450 gaming K4 as well the CPU a Ryzen 7 3700 X. I added 2 RAMs 16 GB G-skill and when I tried to put on my GPU, a ...

Score: 0
Md. Jakaria Hossain Jihad avatar
Keyboard is not working in the main screen and in Terminal too
lc flag

I have installed Ubuntu 20.04lts. From last night, my keyboard is not working except in the lock screen. But it does some command like alt+F4 to close any application. My laptop is HP Pavilion G6. What can be done?

Score: 0
TheTriaJ avatar
Installed KDE but cant remove it now
tk flag

As said in the title, I was tired of the default look of ubuntu and installed KDE-Full.

Informations about my system: OS: Ubuntu 20.04 GPU Vendor: AMD (although I doubt that this will be necessary)

But when I now go about and say:

sudo apt-get remove kde-full
sudo apt-get autoremove

It does remove the KDE part. But when I now reboot my system I am unable to see anything.
All I get prompted is a screen t ...

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